AMBLYOMMA. 21 
only free on grass and bushes in the “tierra caliente” and “ tierra fria ” of Guatemala 
(Retalhuleu, Guatemala city). The female, which abounds in the woods and savanas 
on grass and bushes, is occasionally rubbed off by horses, cattle, or dogs, and even by 
man. It adheres tenaciously to the skin, fixing itself by perforating the cutis with its 
sucking-apparatus ; and remains, when undisturbed, for several days, till filled with 
blood, and then probably falls off spontaneously by its own weight. If forcibly 
removed, the sucking-apparatus breaks off and remains in the wound, causing a 
disagreeable and sometimes painful inflammation for a considerable time, but I never 
saw any serious consequences result from it. Even in its juvenile state the garrapata 
is of parasitic habits. The young, which are distinguished by the inhabitants of 
Guatemala by the name of “ mostacilla” (derived from ‘‘ mostaza,” mustard), hang 
to the grass in clusters of thousands, especially during the dry season; and by their 
creeping on the bare skin and frequent biting they form one of the greatest plagues 
to the European traveller, who is sometimes kept awake for hours during the night 
by them. The males I have heard spoken of as ‘“‘conchuda.” ‘The female has been 
collected by Mr. Janson in Nicaragua, by Mr. Rogers in Costa Rica, and by myself 
in many places of the “tierra caliente” and “tierra fria” of Western Guatemala 
(Retalhuleu, Escuintla, Antigua, Guatemala city). 
Remarks. Though I have not seen the types of A. mixtum, which Koch describes 
as from Mexico, I cannot doubt that the above described Amblyomma really belongs to 
that species. As Koch describes and figures both sexes, his must therefore have been 
a common species; and the above described is the most common of all Ixodide in 
Central America, and probably also in Southern Mexico. 
2. Amblyomma foreli, sp.n. (Tab. XII. figg. 3-30; and Tab. XIV. figg. 3, 
3a-3 d, 2.) 
3 latet. 
Q. Corpus ovato-depressum, abdominis cuticula (in exemplo satiato, in alcoholo praservato) ex griseo fusca 
seu olivacea, punctis, striolis transversalibus atque maculis numerosis fuscis marmorata. Scutum occi- 
pitale oblonge triangulatum, angulis rotunde truncatis, planum, nitidum, punctis nigris magnis raris 
impressis in superficie dorsuali ornatum, nigrum, in angulo postico maculam colore sucineo ferens, e qua 
stria lata mediana obscure castanea ad marginem scuti anteriorem petens nascitur. Margo humeralis 
punctis impressis caret. Scutum frontale nigrum, nitidum, punctis impressis raris ornatum ; foveole due 
frontales oblonge, postice truncate, antice angulatim protracte. Arca mandibularis basi nigra, apicem 
versus flavescens, hamulis quinque, binis in primo, ternis in secundo ramo dispositis armata; arca maxil- 
laris colore succineo. Palpi fusci, nitidi, superficie interna deplanati, externa convexi; articulus quartus 
minimus tertio excentrice insertus. Pedes ex piceo fusci, setulis paucis instructi. Lamina stigmatica 
triangularis, angulis late rotundatis, rima stigmatica claviformi. Lamina analis utriusque lateris setas 
duas in margine postico ferens. 
Long. (in satiato) corporis 20 millim. ; rostri 1 millim., scuti occipitalis 2-5 millim.; lat. corporis 11 millim., 
scuti occipitalis 2°25 millim. 
Hab. Guatemaa, Retalhuleu (Sto). 
